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Question: A roulette wheel contains the numbers 0, 00, and 1 to 36. If you bet $1 on a single number coming up, you earn $35 if the number comes up and lose $1 otherwise. Find the mean and standard deviation of your winnings on a single bet. Then find the mean and standard deviation of your net winnings if you make 100 bets. You can assume (realistically) that the results of the 100 spins are independent. Finally, provide an interval such that you are 95% sure your net winnings from 100 bets will be inside this interval.
A sample of 81 observations is taken from a normal population. The sample mean is 40, and the sample standard deviation is 5. Determine the 95 percent confidence interval for the population mean.
Last semester a certain professor gave 13 as out of 285 grades. if grades were assigned randomly what is the probability of an A.
1. When is it appropriate to use a matched-pairs t-test to conduct a hypothesis test?
State the hypotheses for a chi-squared test in the context of this problem. Calculate the expected matrix and describe what it represents. Calculate the test statistic. Describe what this represents and answer the question posed.
If a student scored 90 points on a test where the mean score was 82.2 and the standard deviation was 5.7. What steps do I do to find out the student's z score?
The mean salary, do you think introducing Michael Jordan's last annual salary of more than $30 million would skew this distribution?
PCBs are a class of chemicals often found near the disposal of electrical devices. PCBs tend to concentrate in human fat and have been associated with numerous health problems. Determine the mean, median, and standard deviation. Find the 25th, 50th..
At the Warren Road MacBurger, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
suppose 250 people out a survey asking how many dogs and cats they own. the results are given in the following table
That 95% of all daily sales fell between $19,200 and $36,400. Based on this information what were the mean sales? What was the standard deviation?
1. what is the r value for the relationship between hamstring strength index 60degs and the shuttle run test? is this r
Evaluate 2-month moving average and Exponential smoothing by MAD.
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